GEA Grasso M-Series, Руководство по эксплуатации

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Hint!
For specific operations the selection
and evaluation will take place within
the manufacturer's compressor selec-
tion programme.
Caution!
To avoid "zero flow" in the compres-
sor, which can damage the compres-
sor, the minimum control slide posi-
tion in the manufacturer's compressor
selection programme must be adhered
to.
"Minimal control slide position <value>
% accepted start."
If the value entered is "> 0", then a lim-
itation of the control slide path must
be put in place in coordination with the
manufacturer. The path limitation can
be set created mechanically with a
stop sleeve or by installing virtual con-
trols (virtual stop sleeve) on the com-
pressor.
Maximum permitted pressure p bar g. max.
≤28 bar
or
≤52 bar
Pressure ratio p / p
0
π - min. > 1.5
Pressure difference (p - p
0
)
Δp bar min. > 0.8
Suction temperature t
0
(compressor inlet) t
0h
°C min. > - 60
Discharge temperature (compressor outlet)
t
e
°C max. < 120
Compressor frame size H L
M/N
*)
28 bar
M/N
*)
52 bar
max. Drive power (kW)
50 Hz
60 Hz 300
360 300
360 300
360 530
640
max. Nominal torque
**)
Nm 960 960 960 1700
max. permissible speed
min
-1
4500 4500 4500 4500
min. permissible speed
min
-1
1000 1000 1000 1000
*)
For type M/N, the compressor drive shaft ends are different for 28 bar and 52 bar versions.
**)
When running the compressor, the maximum torque falls by 25% as opposed to electrical drives.
Hint!
All of the following requirements must
be observed!
1. Compressors for a discharge pressure up to 52
bar (currently not available) are equipped with
housings made of a material of higher strength
and are fitted with special components.
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages Description of Design and Function
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015 49